"Controlling magnetism in a Mott insulator by optical pumping" by David Hsieh (Caltech)

Date: 
Thursday, March 14, 2019 - 3:30pm to 4:30pm
Series: 
Physics and Astronomy Colloquium

Thursdays, 3:30-4:30 pm

1-434 Physics and Astronomy (map)
Reception from 3:15-3:30 p.m.
(unless otherwise posted)

Guest Speaker: David Hsieh (California Institute of Technology)

Talk Title:  “Controlling magnetism in a Mott insulator by optical pumping”

Abstract:

Controlling antiferromagnetic (AFM) order with ultrashort optical pulses can lead to both advances in our fundamental understanding of out-of-equilibrium quantum many-body physics as well as to novel AFM-based high-speed and non-volatile information storage and processing technologies. However, optically manipulating AFM order and detecting its out-of-equilibrium behavior have proven difficult owing to various factors such as the absence of net magnetization and the ultrafast timescales involved. In this talk, I will describe a novel time-resolved nonlinear optical polarimetry technique that is capable of measuring ultrafast changes in magnetic symmetry, and how we have deployed this technique to reveal unusual out-of-equilibrium critical behaviors of AFM order in an optically pumped Mott insulator.

 

For more information, contact Yaroslav Tserkovnyak

We thank the following people for their contributions to the wine fund for the post-colloquium reception:
Professors Katsushi Arisaka, Andrea Ghez, Karoly Holczer, Huan Huang, HongWen Jiang, Per Kraus, Alexander Kusenko, Matthew Malkan, Mayank Mehta, Warren Mori, Ni Ni, Seth Putterman, Yaroslav Tserkovnyak, Vladimir Vassiliev, Shenshen Wang, and Nathan Whitehorn.

Location: 
1-434 PAB